I am trying to send mails in large numbers, say 1000, using a java test application and a mail server, but though the application confirms that it has sent all the 1000 mails without any exceptions, I am not receiving the exact number (1000) of the same in the in box of the recipient's mail box(all the mails are sent to the same email recipient for testing the application's reliability). That is few of them goes missing each time I execute the application. Is there any means for the java application to verify whether each mail that is being sent using the mail server has reached the destination? And why do they go missing in the first place? It would be of great help if some one could provide tips/suggestions on how to tackle this.
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